Phorum Database Error

Sorry, a Phorum database error occurred.
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Error:

Table './phorum/phorum_messages' is marked as crashed and should be repaired (145): SELECT * FROM phorum_messages USE INDEX (new_threads) WHERE status=2 AND forum_id = 61 AND moved = 0 AND parent_id = 0 ORDER BY message_id DESC LIMIT 30

Backtrace:

Function phorum_database_error called at
{path to Phorum}/include/db/mysql/mysqli.php:175
----
Function phorum_db_interact called at
{path to Phorum}/include/db/mysql.php:734
----
Function phorum_db_get_recent_messages called at
{path to Phorum}/feed.php:75
----